Bolt for fixing railway chairs, rails, and the like.



110. 874,611. PATBNTED 111:0. 211, 1907.

W. E. G. .MIORTIMORE BOLT FOR FIXING RAILWAYGHAI-RS, RA AND THE LIKE.

- APPLIoATIoN FILED F2114, 19 l www?? i. To all whom it may concern."

UNITED STATES 'PATENT 'oEEroE WA-LTEREDWARD GEORGE MORTIMORE, OF GOSPOR'I, ENGLAND.

BOLT FOR FIXINGARAILWAY CHAIRS, RAILS, AND THE LIKIE.

Specification of Letters Patent.

Patented' Deo. 24, 1907.

Application filed February 4. 1904. Serial No. 355.663.-

' consistsessentiallyof two parts, one the bolt proper and the other a metal cone screwed.'

on to the lower part of thebolt adapted when Ythe bolt isdriven home to retain the same in position.,

In order that the saidinvention may be readily understood reference is tobe had to description and accoinpanying sheet of drawings in whichzthe following `Figure l is a view of the bolt complete; Fig. 2 a view of the boltwith cone detached; Fig: 3 a section on line a; Fig. 1; Fig.'4 a view ofa modified form of bolt; Fig. 5 a detached view of the cone; and, Fig. 6 a section on line y, y Fig. 4. v Like. letters of reference indicate Aspending parts.v

- In said drawings a-.Figs.`1, 2 and 4, rcpresents the bolt-head and. b the taper shank having at its lower endV a reduced. screwythreaded portion' c'-F igs. `2 and 4-.-ter1ni nating in a point d. The shoulder e of the corre- -shank, formed byithe reduced portion, is

adapted to be'engaged with by the top part f of the metal cone g which screws onfto said reduced part c -s"o"` as to form the entire boltas in Fig. 1. The cone is cut away in parts leaving upwardly and outwardly extending projections, tongueslor barbs t- Figs l and mwhich, when the bolt is d riven .into thematerial in the usual manner, keep said cone iirmly screwed'upto the shoulder on bolt or shank' by the engagement of said projections, tongues or barbs with the material into which the cone is driven. i

The bolt during the driving` rocess is obstructed byV the groove on shan Figs. 1

`to 3 orby the rib asin Figs. 4 and 6, and further the top part k of the head a ofthe bolt is made dome-shaped so as not tobe knocked out of shape .when being driven.- The bolt may be withdrawn by the use of a Spanner or wrench to overcome the resistance offered by the spline against backward movement of the spike, this, of course, increasing the size of the hole in the wood, 'permitting the withdrawal of the spike, but the' cone remains fast vin the material by reason of the engagement of the tongues or projections with said material. y

Having no'av described my invenfiion, what I claim as negv and desire 'to secure by Letters Patent of he United States is .1. Abohy for fixing railway chairs, rails means on said shank 'to-preventfihe rotation.

thereof.

2. A bol-;l for iiXing railway chairs, rails and 'the like, consisling of a head and taper shank, the shankhaving a screalthreaded reduced' portion Lermma'ing 1n a driving point, a shoulder formed by such reduction,

a cone adapfedio be screwed onto said reduced porion of shank to engage the shoulder thereof and means on said shank to prevent 'the rotation i hereof.

3...`Abolt` for fixing rail-.ray chairs, rails andthe like, consisting of a head and taper shank, the shank having a screw-threaded -reduced porLion terminating 1n -a drivlng point, a shoulder formed by such reduction,l

a .sore wthreaded cone' having upwardly and outwardly extending tongues, projeciions or barbs 'to engage the reduced por'ilon of the shank for the purposeof keeping theicone up to the shoulder and means on said shankto ,prevent the rotation thereof. I In testimony whereof I have affixed my,

signature in presence oftwo witnesses.

WALTER EDWARD GEORGE nomment; v

Witnesses: v

A..J'. WHITTIEE, A. J. Norm/an. 

